Heat capacity and transport studies of the ferromagnetic superconductor RuSr2GdCu2O8

Details Heat capacity and transport studies of the ferromagnetic superconductor RuSr2GdCu2O8 Heat capacity and transport studies of the ferromagnetic superconductor RuSr2GdCu2O8

1999-11-09

arxiv.org/abs/cond-mat/9911135v1

Physics

Condensed Matter

Superconductivity

9 pages, 6 figures, submitted to Phys. Rev. Lett 1 June 1999

Scientific paper

Resistivity, thermoelectric power and heat capacity are investigated in the ferromagnetic superconductor RuSr2GdCu2O8 with and without Zn substitution. The thermodynamic signatures of the ordering of the Ru moments and the paramagnetic Gd moments as well as the onset of superconductivity are all clearly seen and quantified. The materials are shown to exhibit bulk superconductivity which coexists with spatially-uniform ferromagnetism. They appear to be typical underdoped superconducting cuprates in which the pseudogap dominates normal-state transport, thermodynamic and substitutional properties. However, a field-induced increase in Tc could suggest some degree of triplet pairing.

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